Thermostat



E. B. LENNIG,l THERMOSTAT.

A APPLlcATloN man Aue.16.1917. y 1,420,659. Patented June 27, 1922.

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THERMOSTAT.

APPLICATION FILED AuG.I6. 1911.

1,420,659, Patented June 27,A 1922 2 SHEETS-SHEET 2.

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EDMUND B. LENNIG,` OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO THERMIC ENGI- NEERING CO., 0F SAN FRANCISCO, CALIFORNIA, A CORPORATION OF CALIFORNIAW THERMOSTAT.

Specification of Letters Patent. Patented June 27,1922,

`Application filed August 16, 1917. Serial No. 186,568.

To all whom t may concern:

Be it known that I, EDMUND' B. LENNIG, a citizen of the United States, residing at San Francisco, county of San Francisco, State of California, have invented a new and` useful Thermostat, of which the following is a specification.

My invention relates to a novel thermostatic device comprising a novel and unique thermostat blade formed by annealing together two metal bodies of different mass and alloy ,to form a concrete unit, novel means being provided to effect the mountingv ofthe thermostat blade and the supporting member carrying the adjustable' contact liXedly in relation to` each other on a stationary element. l

A ,further object of my invention is to provide a novel thermostatic deviceof this character to control electrical devices in or out of thermal communication with the thermostat, when plugs are used for connecting electric devices.. l

A further object of my linvention is to provide a thermostatic device of such character that the same may be attached to any electric device using a plug connection by arranging one side of a terminal so that a complete circuit of electric energy will be obtained in the thermostat.

My invention further consists ofy a novel manner of mounting and collocating said thermostat blade andy its adjuncts whereby a novel device of great 'utility is produced,

as will be hereinafter described and pointed out in the claims.

For the purpose of illustrating my invention I have shown in the accompanying drawings one form thereof which is at present preferred by me since the same will be found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can beivariously arranged and organized and' that my invention is not limited to the precise arrangement and organization of :theseinstrumentalities as lherein shown and described.

Figure 1 represents a side elevation of an electriciron with a thermostat' embodying my invention attached thereto.

Figure 2 represents a rear `view of the iron Figure 3 represents a section on line 3-3 of Figure l. f

Figure 4 represents a section on line 4-4 of Figure 1.

Figure 5 represents a section on line 5-5 of Figure 6.

Figure 6 represents a section on line 6-6 Fi re 2.

igure 7 represents a rear view of Figure 6 with the thermostat casing removed showing an opening in communication with the interior of the electric iron.

Similar numerals of reference indicate correslponding parts in the figures.

eferring to the drawings,

1 designates the shell, casing or body of an electric iron inclosing the heating coils 22 seen in Figure 4- which may be of any suit able form or construction.

2 and 3 designate terminals for the con-A nection of a plug and cord forjthe conveying of electric current. 4 designates a base composed of insulating material upon which are mounted the terminals 5 and 6.

It will be understood from Figure 4 that the terminal 5 is attached to the terminal 2 and held in position by screws 2() and in contact with the metal plate 11 for the conveying of electric energy to the contact point 12 thence to contact point 14 to post 15 and metal strip 16, as will be best understood from Figure 3. The terminal 6 is held in position by.a screw 20 against the insulatingrblock 4 and in contact with the metal strip- 16 and in connection with the coil 22 by the wire or metal 21.

7 designates the casing inclosing the pthermostatic blade composed of the members 10 and 10X which as will be understood from the sectional view in the upper portion of Figure 3 are of different mass and alloy.

8 designates screws which hold the base 9'composed of insulating material in place within the casing 7. 11 designates a metal` of the thermostatic blades 10 and 10X' for different temperatures.

15 designates a post fastened to the metallic member 16 and tapped for the adjusting screw 14, it being apparent that the terminal 6 is in contact with the metal 'plate 16.

17 designates a hole in the casing 7 of the thermostat to allow for the adjusting of the screw 14. 18 designates holes in the casing 7 to permit of the insertion of screws to hold the thermostat in position upon the shell 1 of the electric iron.

19 designates an opening in the casing 1 of the electric iron for the communication of the heat of the iron direct to the thermostaticj 20 desi nates screws'A holding the parts 5,

the coil 22, it being apparent'that when the l electric device cools it will cause the thermostatic blade composed of the members 10--10X to contract and thus bring in contact the points 12 and 14`Which energize `the coil 22.

It `will be understood that my novel device is operative under or susceptible to either heat or cold and that it is very sensi-- tive and quickly responds to any change of temperature according to .requirements the two bodies constituting my thermostat hav- 111g different co-efiicients of expansion and it 1s furthermore adjustable to dili'erent tem.- peratures.

I desire to call special attention to my novel construction of the terminals of the iron or other similar electric device where a plug and terminals are used forl the conveying of electric current to the thermostatic device and it will be understood by those skilled in the art that thejforegoing ar-l rangement is but'one manner of using my novel thermostatic device as the same may be utilized in various ways and in connection with numerous other electrical 0r-other mechanisms, as will be apparent to those skilled in the art. While I have shown my invention, in the present instance, as particularly applicable to the control of an electric sad iron, it will be understood that I do not desire to be limited in every instance to its application to a sad iron since there are many other electrical devices such as cookers, toasters and the like to which may invention is applicable, the 'same in its broad aspects being capable of being readily attached at a point between the plug and the heating elements irrespective of the use the device itself may be put to whether for ironing, heating, cooking, toasting or the like.

In the present/instance, I have modified the electric iron by using two more terminals ''than are now ordinarily used and I break the circuit of the electric current by causing the same to pass through the thermostat insteadA of directly to the heating coil of the iron or other device andwhile I have shown a curved thermostatic blade as being employed it will be obvious that the contour of 'the blade may be varied according to requirements.

Having thus described my invention, what I claim, as new and desire to secure by Letters Patent, is

1. In a device of the character stated, a body, aplate of insulating material secured thereto, terminals mounted on said plate and projecting outwardly from said body, Da thermostatic blade casing attached to said body and receiving the ends of saidy terminals, and a thermostat blade in said casing formed of U-shape and having/one of its limbs attached to a fixed support and its other limb coacting with an adjusting device.

2. In a device of the characterstated, a body, a plate of insulating material carried by the interior of said body, terminals mounted on said plate and projecting outwardly from said body, a thermostatic blade casing attached to said body and receiving the ends of said terminals, and a thermostat blade .in said casing extending transversely to the axis of said body and having one of its limbs attached to a fixed support and its other limb coacting with a vertically adjustable Contact depending from the top of the thermostat casing.

Witness:

GEO. PEOR. 

